Synthesis of CdTiO3 thin films and study the impact of annealing temperature on their optical, morphological and structural properties

Abstract

CdTiO3 thin films (TF) were deposited on conductive glass substrate (ITO) at different annealing temperatures (300, 400, 500, 600) °C by a doctor building method with composition ratio (1:1) of TiO2 and CdO. Many techniques such as: Energy Dispersive Spectroscopy (EDS), X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM) and Ultraviolet – Visible Spectroscopy (UV-Vis) were used to describe the structure, morphology and optical characteristics of prepared TF. XRD patterns show the rhombohedral structure and crystalline nature of the films. All films were nano materials according to Scherrer equation in XRD analysis. SEM images relate the homogenous films as thickly stuffed nano particles. AFM analysis demonstrated that both the surface roughness and grain size rise slightly with increasing temperature. EDS investigation approves the existence of oxygen, cadmium and titanium components with equal atomic ratios of cadmium and titanium. By application of Tauc plots, optical band gaps of CdTiO3 films are proposed to be (2.25-1.73) ev at the range of temperatures (400-600) °C.